Telescopic trestle.



No. 818,005. PATENTED APR. 17, 1 906. J. s. TURNER & P. P. HAUSMANN.

TELESOOPIG TRBSTLB.

APPLICATION FILED MAR25, 1905.-

JOSEPH S. TURNER AND PAUL F. HAUSMAN'N, OF

CALIFORNIA.

Lo s ANGELES,

TELESCOPIC TRESTLE.

Speciflcationof Letters Patent.

Patented April 17, 1906..

Application filed March 26, 1906. Serial No. 251,982.

. trestles," such asare used by palnters, plasterers, and calciminers, and the object of the adjustment is to adapt the trestle for'use under different conditions, as in rooms of different height.

The invention relates particularly to a telescoplc standard which serves as a trestle-support and is quickly and conveniently adjustable to vary its height.

The accompanying drawings illustrate the invention. v

Figure 1 is a perspective of the trestle, the platform being partly broken away to more clearly show. the support. Fig. 2 is a vertical section, artly in elevation, of one ofthe posts. ig. 3 is a horizontal section on the line X X in Fig. 2. 1 Fig. 4 is a detail of a catch for holding the post in set position. Fig. 5 is a detail elevation of the catch and the cooperating parts. Fig. 6 is a 9 side elevation of one form of the invention adapted for greater elevation.

1 designates the trestle-platform, and 2 the cross beams or strips thereof. A plurality of standards 3 are providedfor example, one

I for each corner of\ the platform. Standards 3 are formed of two members-a lower or base member 4, adapted to rest on the floor, and an upper post member 5, adjustably supported in and on said base member and eni 1 platform.

aging the platform to su port the same. The post members may have forked or crotched heads 6, ada ted to embrace. the beamsor strips Z-Ion t e under side. of'the slides within t e lower member- 4, andfor this pur'po'se both of said-members may be formed of tubing of appropriate size. head or collar 7 on the outer. tube or base member 4 carriesacatch or dog 8, engaging m stops or detents 9 inthe inner or upper Upper member 5 telescopes or member 5, said catch being formed as a link, one end of which traverses slots 10 in a lug 1.1, extending u wardly from collar 7, said link embracing t e post members 5 and having an inturned portion or lug 12 at its other end engaging in any one of a series of holes or recesses in the member 5.

In order to support the standards in up right position, the base member 4 is extended at the bottom, a foot-block 13 being screwed on the lower end .thereof and short arms or members 14 being screwed into said block and into angle-pieces 15, from which brace bars or members 16 extend diagonally upward into a collar 17, secured to member 4. The member 4 may have its lower portion 4 formed as a separate pipe joint, the two parts 4 and 4 screwing into the collar 17, which joins them together. Arms 14 and braces 16 may be gas-pipe sections screwing into the respective parts 13, 15, and 17.

In order that the trestle may be moved from place to place by simply lifting and'carrying the platform without the standards separating therefrom, it is desirable to connect the strips 2 in the platform to the heads. 6 by pins or bolts 19 and to provide means for preventing disengagement of the catch 8 from the detent-holes 9 when the: arts are so lifted. Said catch-link is prefera 1y 0 an at one end, its free ends engaging in the s ots 10 on opfposite sides of the ug 11', and said slots are 0 an inverted-V form, so that by lifting the link at that end and sliding it over the rise of the slot it may be moved either into or out of position to engage the detent-holes 9.

I 20 desi ates an extension on head 7' to support t e link when in released position. Lugs 21, extending upwardly from head 7, project over the link 8 when the latter is in detent-engaging position, so that when the upper member 5 1s lifted, as above set forth, it will, by means of the lugs and of the link 8, also lift the lower member.

22 designates a lateral slot leading from guide-slot 10 to enable insertion of the catchink in assembling the machine.

In using the trestle the standards 3 are placed in proper position and the platform is placed thereon with its cross-stri s restin on the heads of the standards. L or after the platform is laced in position each of the standards canihe adjusted to the ither be ore desired hei ht bylifting the upper inner member thereo first moving the catch-link 8 to free itself from the stops insaid member and then when the proper elevation is obtained moving the catch-link over to engaging pos1t1on. In case the two-part standard does not give sufficient range of elevation an intermediate member may be provided, as shown in Fig. 6, where 24 desi ates the upper member, 25 the lower or ase member,

and 26 the intermediate member, all formed as tubes, the member 24 telescoping within member 26 and the latter telescoping within member 25. The head 27, carrying the catch-link 8 in this case, is attached to the .top of the intermediate member, said link working ina slot 30 in a bracket 31 and engaglng in holes 29 in the upper member, and said lntermediate member is provided with a series of holes 32 to receive a pin 33, passin through a hole 3e in a head 35 at the top 0 lower member 25.

36 designates foot extensions on lower member 25 and 37, braces extending therefrom .to the head 35. It will be seen that by ralsmg the intermediate member with the lower member an elevation can be secured in addition to that obtained by adjustment of the upper member without the intermediate member.

' What We claim is Y 1. A trestle-standard comprising an outer tubular member provided with a base, a member slidable within said outer member and having a series of holes, a link surroundmg the inner member and engaging at one end with the holes in the inner member and at the other end with the top of the outer member and means on the outer member engaging the said link to lift the outer member when the inner member is lifted.

2. A trestle-standard comprising an outer member rovided with a' base, an inner member slida 1e within the outer member and havmg .a series of holes, a link slidably mounted on the top of the outer member and having a portion to enter said holes,'and lugs on the outer member, extendingover said hnks, for the purpose set forth.

3. A trestle-standard comprising an outer member provided with a base, an inner member slidable within the outer member and having a series of holes, a link slidably mounted on the top of the outer member and having a ortion to enter said holes, and means for holding said link in difierent posi-- tions to engage it with or release it from the inner member.

4. A trestle-standard comprising an outer member rovided with a base, an inner member slidable within the outer member and having a series of holes, a link slidably mounted on the top of the outer member and having a ortion to enter said holes, and means for olding said link in difierent horizontal positions to engage it with 'or release it from the inner member, said means comprising a part on the outer member formed with a slot in which the link movably engages.

5. A standard for trestles comprising three telescoping members, the outer member having a perforation to receive a pin, the intermediate member having a series of holes to register with said perforation in the outer member and the inner member having a series of holes and a link ivotally mounted at the top of the interme late member and engagingwith theholes in said inner member.

6. trestle-standard comprising telescoping tubular members, the outermember havin a part with a V-shaped slot and a catchlin movable in said slot, the inner member iiglzing detent parts engaged by said catch- 7. A trestle-standard coinprising telescoping tubular members, the outer member having lu s and a part with a V-shaped slot, and

a catc -link movable in said slot and engaging said hi s in one position of said link, the

inner mem er having detent parts engaged by said catch-link.

In testimon whereof we have hereunto set our hands, at 0s Angeles, California, this 8th day of March, 1905.

- JOSEPH S. TURNER.

PAUL F. HAUSMAN N. In presence of-'- ARTHUR P. KNIGHT, W. S. Born. 

